Antonyms of adj rock-steady

1 sense of rock-steady

Sense 1
dependable, rock-steady, steady-going -- (consistent in performance or behavior; "dependable in one's habits"; "a steady-going family man")

INDIRECT (VIA steady) -> unsteady -- (subject to change or variation; "her unsteady walk"; "his hand was unsteady as he poured the wine"; "an unsteady voice")

Similarity of adj rock-steady

1 sense of rock-steady

Sense 1
dependable, rock-steady, steady-going -- (consistent in performance or behavior; "dependable in one's habits"; "a steady-going family man")
       => steady (vs. unsteady) -- (not subject to change or variation especially in behavior; "a steady beat"; "a steady job"; "a steady breeze"; "a steady increase"; "a good steady ballplayer")